Liquid duct



FIG. 1 is a perspective view of the liquid duct.

FIG. 2 is a front elevation view of the liquid duct.

FIG. 3 is a left side elevation view of the liquid duct, where the right side elevation view is a mirror image of the left side elevation view.

FIG. 4 is a back elevation view of the liquid duct.

FIG. 5 is a top view of the liquid duct; and,

FIG. 6 is a bottom view of the liquid duct.

The broken lines of FIGS. 1-6 are included for the purpose of illustrating environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a liquid duct, as shown and described. 